/* ==========================================================================
   个人主页 · 样式表
   设计基调：冷调浅色纸感 + 科技蓝点缀 + 中文衬线 + 手写体标题
   想换配色？直接修改下方 :root 中的 CSS 变量即可
   ========================================================================== */

/* ---------- 主题变量 ---------- */
:root {
  /* 亮色主题：冷白雾灰 */
  --bg: #f5f7fa;
  --bg-soft: #eef1f6;
  --card: #ffffff;
  --text: #2a2f3a;
  --text-soft: #6b7280;
  --accent: #4f7fe8;                 /* 科技蓝 */
  --accent-strong: #3a63c4;
  --accent-soft: rgba(79, 127, 232, 0.12);
  --on-accent: #ffffff;              /* 实底强调色按钮上的文字颜色 */
  --border: #e4e8ef;
  --shadow: 0 2px 12px rgba(30, 50, 90, 0.06);
  --shadow-hover: 0 6px 22px rgba(30, 50, 90, 0.13);

  /* 字体：中文衬线 + 手写体（字体加载失败时自动回退本地楷体 / 宋体） */
  --font-body: Georgia, "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-hand: "Ma Shan Zheng", "STXingkai", "华文行楷", "KaiTi", "楷体", cursive;
}

/* 暗色主题：冷调深蓝灰 */
[data-theme="dark"] {
  --bg: #161b22;
  --bg-soft: #1e2530;
  --card: #1e2530;
  --text: #dbe4f0;
  --text-soft: #8b95a5;
  --accent: #7aa2f7;
  --accent-strong: #95b1fa;
  --accent-soft: rgba(122, 162, 247, 0.16);
  --on-accent: #0f1520;
  --border: #2d3542;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 6px 22px rgba(0, 0, 0, 0.45);
}

html { color-scheme: light; }
html[data-theme="dark"] { color-scheme: dark; }

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: 0.02em;
  color: var(--text);
  background-color: var(--bg);
  min-height: 100vh;
  transition: background-color 0.35s ease, color 0.35s ease;
  -webkit-font-smoothing: antialiased;
}

/* 纸张颗粒质感：SVG 噪点叠加，纯本地实现，不依赖任何图片文件 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='260' height='260'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: 0.04;
}
[data-theme="dark"] body::before { opacity: 0.06; }

.container {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

::selection { background: var(--accent-soft); }

a { color: var(--accent); }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- 右上角主题切换按钮 ---------- */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 10;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--card);
  box-shadow: var(--shadow);
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.25s ease, background-color 0.35s ease, border-color 0.35s ease;
}
.theme-toggle:hover {
  transform: rotate(15deg) scale(1.1);
  border-color: var(--accent);
}

/* ---------- 头像 / 昵称 / 一句话介绍 ---------- */
.hero { text-align: center; padding: 96px 0 48px; }

.avatar {
  width: 124px;
  height: 124px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--card);
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow-hover);
}

/* 随时间变化的问候语 */
.greeting {
  margin-top: 20px;
  font-family: var(--font-hand);
  font-size: 1.15rem;
  color: var(--accent);
}

.nickname {
  margin-top: 4px;
  font-family: var(--font-hand);
  font-weight: 400;
  font-size: clamp(2.5rem, 7vw, 3.4rem);
  line-height: 1.3;
}

/* 昵称下方的科技蓝短线装饰 */
.nickname::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin: 14px auto 0;
  border-radius: 2px;
  background: var(--accent);
}

.intro {
  margin-top: 18px;
  color: var(--text-soft);
  font-size: 1.05rem;
}

/* 打字机光标 */
.type-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  margin-left: 2px;
  vertical-align: -0.12em;
  background: var(--accent);
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- 社交链接 ---------- */
.social {
  margin-top: 28px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

.social a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  box-shadow: var(--shadow);
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.25s ease, border-color 0.25s ease,
              transform 0.25s ease, box-shadow 0.25s ease;
}
.social a:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.social svg { width: 15px; height: 15px; fill: currentColor; }

/* ---------- 通用卡片区块 ---------- */
.section {
  margin-top: 26px;
  padding: 34px 32px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
  font-family: var(--font-hand);
  font-weight: 400;
  font-size: 1.65rem;
  line-height: 1.2;
}
.section-title::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}
.section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ---------- 关于我 ---------- */
.about { margin-bottom: 18px; }
.about p { margin-bottom: 14px; font-size: 0.95rem; }
.about p:last-child { margin-bottom: 0; }

/* 技能标签（与项目标签共用同一种胶囊样式） */
.skill-list { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-list span,
.project-tags span {
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.75rem;
}

/* ---------- 项目卡片 ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.project-card {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.project-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}

.project-name { font-size: 1.05rem; font-weight: 600; }

.project-desc {
  margin: 6px 0 12px;
  font-size: 0.92rem;
  color: var(--text-soft);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.project-link { font-size: 0.88rem; text-decoration: none; }
.project-link:hover { text-decoration: underline; }

/* ---------- 文章列表 ---------- */
.post-list { list-style: none; }
.post-list a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 13px 4px;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px dashed var(--border);
  transition: color 0.25s ease, padding-left 0.25s ease;
}
.post-list li:first-child a { padding-top: 0; }
.post-list a:hover { color: var(--accent); padding-left: 8px; }
.post-title { font-size: 0.98rem; font-weight: 600; }
.post-meta { font-size: 0.8rem; color: var(--text-soft); white-space: nowrap; }
.post-more { margin-top: 16px; font-size: 0.85rem; color: var(--text-soft); }

/* ---------- 动态时间线 ---------- */
.timeline {
  list-style: none;
  border-left: 2px solid var(--border);
  padding-left: 26px;
}
.timeline li {
  position: relative;
  padding-bottom: 22px;
  font-size: 0.95rem;
}
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 10px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.timeline-date {
  display: block;
  margin-bottom: 2px;
  font-size: 0.82rem;
  color: var(--accent);
}

/* ---------- 评论区（giscus） ---------- */
.giscus { margin-top: 18px; }

/* ---------- 页脚 ---------- */
.footer {
  margin-top: 46px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-soft);
}

/* 每日一言 */
.quote { margin: 0; padding: 0; font-size: 0.95rem; color: var(--text); cursor: pointer; }
.quote-from { margin-top: 6px; font-size: 0.82rem; color: var(--text-soft); }

/* 实底科技蓝按钮（页脚联系 / 404 返回首页共用） */
.btn-accent {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 26px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--on-accent);
  text-decoration: none;
  font-size: 0.92rem;
  box-shadow: var(--shadow-hover);
  transition: transform 0.25s ease, background-color 0.35s ease;
}
.btn-accent:hover { transform: translateY(-2px); background: var(--accent-strong); }

/* 访问统计 */
.footer-counters { font-size: 0.82rem; }
.counters-dot { margin: 0 8px; }
/* 不蒜子脚本加载成功前隐藏统计，避免显示空括号 */
#busuanzi_container_site_pv,
#busuanzi_container_site_uv { display: none; }

/* ---------- 点击涟漪 ---------- */
.ripple {
  position: fixed;
  z-index: 999;
  width: 14px;
  height: 14px;
  margin: -7px 0 0 -7px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.3;
  pointer-events: none;
  animation: ripple 0.65s ease-out forwards;
}
@keyframes ripple {
  from { transform: scale(0.4); opacity: 0.3; }
  to   { transform: scale(10); opacity: 0; }
}

/* ---------- 入场动画 ---------- */
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}
.hero    { animation: rise 0.6s ease both; }
.section { animation: rise 0.6s ease both; }
.section:nth-of-type(1) { animation-delay: 0.1s; }
.section:nth-of-type(2) { animation-delay: 0.2s; }
.section:nth-of-type(3) { animation-delay: 0.3s; }
.section:nth-of-type(4) { animation-delay: 0.4s; }

/* ---------- 404 页 ---------- */
.notfound {
  min-height: 78vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-align: center;
  animation: rise 0.6s ease both;
}
.notfound-code {
  font-family: var(--font-hand);
  font-size: clamp(5rem, 20vw, 9rem);
  line-height: 1;
  color: var(--accent);
}
.notfound-text {
  color: var(--text-soft);
  font-size: 1.08rem;
  margin-bottom: 14px;
}

/* ---------- 响应式：手机端 ---------- */
@media (max-width: 640px) {
  .container { padding: 0 18px 48px; }
  .hero { padding-top: 72px; }
  .section { padding: 26px 20px; }
  .project-grid { grid-template-columns: 1fr; }
  .post-list a { flex-direction: column; gap: 2px; }
  .theme-toggle { top: 12px; right: 12px; }
}

/* 尊重系统的「减少动态效果」设置 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}